src/charts/types/donut-chart.js
import Chart from '../chart'
import InvalidGrammarError from '../../errors/invalid-grammar-error'
/**
* Represents a Donut Chart.
*/
export default class DonutChart extends Chart {
/**
* Creates an instance of the DonutChart class
* @param {string} data - JSON string containing the data columns.
*/
constructor(data) {
super(data)
// Set charts types as Donut Chart
this._outputJson.data.type = 'donut'
}
/**
* Alter the parameters of the chart using the provided grammar.
* @param {string} grammar - Simple grammar string describing the chart.
* @returns {boolean} - Returns true if the grammar is parsed.
*/
do(grammar) {
if (!super.do(grammar)) {
if (grammar.match(new RegExp('set title as [0-9a-zA-Z\\-]+'))) {
let chartTitle = grammar.match(new RegExp('as [0-9a-zA-Z\\-]+'))[0].split(' ')[1]
this._outputJson.donut.title = chartTitle
return true
} else {
throw new InvalidGrammarError()
}
}
}
}